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Terms for subject Ecology containing middle | all forms | exact matches only
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middle class treatment of waste water污水的二级处理
middle-low mountain中低山
middle-mountain中山区
middle oil中油
middle oil distillate中间馏分
Middle Okinawa Trough冲绳海槽中段
middle pressure reactor中压反应器
waste water middle class treatment污水二级处理指在一级处理的基础上,进一步除去污水中的微细粒子,一般是添加硫酸铝等凝聚剂,使微细粒子凝聚,呈絮状物沉降下来,利用絮状物的吸附力,把被吸附的污物除去